Finding the Fourth Proportional to 207.28, 286 and 115.28
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Solution
The fourth proportional to 207.28, 286 and 115.28 is: 159.06
Step by Step Solution
- Step 1: Write the proportion equation
207.28 : 286 = 115.28 : x - Step 2: Convert to fraction form
207.28/286 = 115.28/x - Step 3: Cross multiply
207.28x = 286 × 115.28 - Step 4: Simplify right side
207.28x = 32,970.08 - Step 5: Solve for x
x = 32,970.08/207.28 - Step 6: Final answer
x = 159.06
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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.